html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  overflow: hidden;
}

* {
  box-sizing: border-box;
}

#app {
  height: 100%;
  display: flex;
  flex-direction: column;
}

.el-container {
  height: 100%;
}

.el-header, .el-footer {
  background-color: #f5f5f5;
}

.el-main {
  background-color: #fff;
  overflow: auto;
} 